steel pipe ,tube 1.Standard:BS,ASTM,GB/T,DIN 2.Material:Q195-Q345 10#,20#,45#, ... ) ManufacturerPlace of originChinaGradeQ195,Q215,Q235,Q345,X42,X60,X65,X70,GR.A,GR.BSpecification1.Outer Dianeter:21.3mm-609.6mm 2.Wall Thickness ... bundles, with hexagonal water proof plastic tarpaulin cover. steel tags ASTM A795 erw carbon steel pipe for fire protect